<html ng-app="exampleApp">
<head>
    <title>Directives</title>
    <script src="angular.js"></script>
    <link href="bootstrap.css" rel="stylesheet" />
    <link href="bootstrap-theme.css" rel="stylesheet" />
    <script>
        angular.module("exampleApp", [])
            .directive("unorderedList", function () {
                return function (scope, element, attrs) {
                    var data = scope[attrs["unorderedList"]];
                    var propertyExpression = attrs["listProperty"];

                    if (angular.isArray(data)) {
                        var listElem = angular.element("<ul>");
                        element.append(listElem);
                        for (var i = 0; i < data.length; i++) {
                            var itemElement = angular.element('<li>');
                            listElem.append(itemElement);
                            var watcherFn = function (watchScope) {
                                return watchScope.$eval(propertyExpression, data[i]);
                            }
                            scope.$watch(watcherFn, function (newValue, oldValue) {
                                itemElement.text(newValue);
                            });
                        }
                    }
                }
            })

            .controller("defaultCtrl", function ($scope) {
                $scope.products = [
                    { name: "Apples", category: "Fruit", price: 1.20, expiry: 10 },
                    { name: "Bananas", category: "Fruit", price: 2.42, expiry: 7 },
                    { name: "Pears", category: "Fruit", price: 2.02, expiry: 6 }
                ];

                $scope.incrementPrices = function () {
                    for (var i = 0; i < $scope.products.length; i++) {
                        $scope.products[i].price++;
                    }
                }
            })
    </script>
</head>
<body ng-controller="defaultCtrl">
    <div class="panel panel-default">
        <div class="panel-heading">
            <h3>Products</h3>
        </div>
        <div class="panel-body">
            <button class="btn btn-primary" ng-click="incrementPrices()">
                Change Prices
            </button>
        </div>
        <div class="panel-body">
            <div unordered-list="products" list-property="price | currency"></div>
        </div>
    </div>
</body>
</html>
